What Killed The Rotary Engine?

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What killed the rotary engine? Wankel engines have struggled to compete with piston cylinder engines, despite their many benefits and overall simplicity. Rotary engines have a long, growing combustion chamber as the rotor spins, making complete combustion difficult - not great for fuel economy. They’re also difficult to seal, and since you have multiple chambers at different stages of combustion, proper seals between chambers is critical. To help promote a good seal, oil is sprayed directly into the combustion chamber. All of this results in an inefficient engine with terrible emissions. You might think that because all of these negative factors exist, it's done for good, but Mazda actually brought back the rotary engine in the MX-30, acting as a single-rotor range extender!
What Killed The Rotary Engine (Full Version) - • 4 Reasons Why The Rota...
Mazda's New Rotary Engine - • Mazda Brought Back The...
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23 май 2024

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Комментарии : 2,5 тыс.

@dannytu0322 Месяц назад

Great engine for a race car, terrible engine for a daily vehicle.

@KenBober 28 дней назад

I've been driving mine daily for 5 years. You just have to learn you can't drive it like a grandma. You have to beat on it.

@SkSKSK283 28 дней назад

@@KenBoberdo you premix your gas?

@KenBober 28 дней назад

@SkSKSK283 of course, omp delete, emissions delete, 1 ounce per gallon for my maxed out street port. Omps are unreliable and THATS what kills them. When you don't get oil to the apex seals the engine becomes a boat anchor.

@dannytu0322 28 дней назад

@@KenBober Exactly, you have to treat it like a race car. Otherwise it starts having major issues. Also, I live in a major city, even here it's almost impossible to find a mechanic willing to work on rotary engines.

@KenBober 28 дней назад

@dannytu0322 same, not even mazda will touch them anymore. Thankfully my coworker has a performance shop dedicated to rotories so I guess I'm lucky. We trade services, I do all his body work and does all my engine work.

@noelmartin2335 29 дней назад

What killed the rotary engine? Ans: Itself 😅

@Eduardo_Espinoza 27 дней назад

Touche

@WillOnSomething 27 дней назад

Epstein can't relate with that

@mafiascrub2213 26 дней назад

No it was men buying there woman a nice new ride and not premixing there oil

@Michael-uc2pn 26 дней назад

The forbidden Dorito

@20cmusic 26 дней назад

Perfect answer.

@rkidy 19 дней назад

I like how in both the animated model and the physical model, the apex seals didn’t hold in either. Kinda shows the main weakness of the engine if you can’t even make a model that works lol

@heroclix0rz 17 дней назад

I mean, just because a 3D print isn't air tight doesn't mean the design is fatally flawed.

@user-ot4ch4qh9c 17 дней назад

@@heroclix0rz but the design is flawed so...

@FRLCA-qc3fc 17 дней назад

It doesn't even have any seals on it in the video, tf are u going off about?

@rkidy 16 дней назад

@@heroclix0rz nah. If you can’t even make a working model for a design, it is fatally flawed.

@rkidy 16 дней назад

@@FRLCA-qc3fc each tip of the spinning triangle looking this is known as an apex seal. It is supposed to maintain cosnstant contact with the walls of the engine, separating each chamber from one another. In both models, the apex seals have a clear gap between the walls of the engine, no longer separating the chambers. If this happened in a real engine, it would straight up not work.

@turnerjazz7872 18 дней назад

I used to sell Mazdas back when the RX8 was new. I loved test driving them and they were a blast as long as you drove them aggressively. I remember we had one come back with a blown engine after about 4 months because the buyer tried to drive it gently and keep it under 3000 rpm. The mechanics at the dealership said you have to drive them at high RPM for the engines to last. That makes them fun but that's a hard dynamic for the average consumer to get and be willing to live with.

@mean.7730 16 дней назад

good for race tracks.. not for a daily driven (city driving)

@UniversalGhost136 13 дней назад

Absolutely loved my RX8 when I had it. And yes you had to have a heavy foot to keep that engine going good. I'd take it when I had class an hour away from home and ran it and I'd take it to the drag strip every so often on the weekends. Miss that car

@blackraven7452 13 дней назад

Gas like water

@electricpaisy6045 12 дней назад

How does that help the engine?

@UniversalGhost136 12 дней назад

@electricpaisy6045 if you go to any rx8 forums or anything to do with the rx8, most people recommend you drive it aggressively atleast once a day. To help prevent carbon build up. It was/is common for people that babied them for the motors to go bad sooner.

@iannordin5250 28 дней назад

Their critical flaw is that the same part of the engine that's supposed to make the seal is also the same part of the engine that is constantly being worn down via friction. Rotary engines literally destroy themselves as a consequence of their own operating principles.

@TheArchighves 28 дней назад

Exactly when he said, what killed the rotary engine I said itself

@AxianMapping 28 дней назад

Like piston rings?

@volvo09 28 дней назад

@@AxianMapping piston rings have an easier time doing their job though. They are round and only have the cylinder walls and the ring lands to seal off. In a rorary you have the apex seals (which need springs to give them tension), and seals between the rotor sides and combistion chamber, it's like qlat least 12 pieces, maybe more if the side seals have springs too.

@ironbeagle1610 27 дней назад

@@volvo09also a piston ring just has to contain a single combustion chamber. While the seals on a rotary engine are constantly working to separate what is essentially several chambers all at the same time, all in different combustion stages. Also it occurs to me that for every rotation of the engine, the rotary seals are experiencing a lot more movement, and this movement is a lot more chaotic and violent when compared to the comparatively simpler back and forward motion of a traditional piston.

@Clyde-2055 27 дней назад

@@supermaster2012- ^😂😂

@Connor_Streetmann 28 дней назад

I love the fact that you probably wrote off that bag of Doritos as business expense

@Eduardo_Espinoza 27 дней назад

Factssssssss/s

@Asad-zeetwo5241 22 дня назад

Lol 😂👍💯🌟

@Byaah191 21 день назад

That's not how taxes work, if you're going by legally, atleast.

@channingtaintum 21 день назад

⁠@@Byaah191 If it was purchased for the purpose of a video production, that’s exactly how it works. You’d be surprised how many things are tax deductible if you do it right.

@revmsj 21 день назад

It would be fair to assume that wasn’t the first take so it’s likely that a whole pallet of chips would need to be ordered and subsequently written off. In fact, I’d have filled a few shopping carts with all sorts of junk food and other groceries because who’s to say what food works best in that clip…

@itsamegabriel8519 22 дня назад

Funfact, there is a company in Austria called Schiebel. They build this huge autonomous helicopter-drones for Military/Maritime use. With those each single gram to spare is super important and having a tremendous amount of Power. For that they use for example Titanium Printed Parts and... a in-house designed Wankel Engine! One engineer told me: because they are only a few dozen flying around the emissions don't matter, the engines are only meant to fly a few missions so short longevity doesn't matter, its operated by a few companies and militaries so money to service doesn't matters, what matters the the size, weight to performance ratio and that is a given.

@knightssquire2376 7 дней назад

Sounds similar to some of the work a US company, Liquid Piston, is doing with the military

@kevriley3255 19 дней назад

I used to rebuild these wankels regularly back in the rx3/4 days. Always the apex seals. Rotor housing seals were equivalent to a blown head gasket really. Super smooth, quiet & high revving, but very thirsty on both fuel and oil.

@dbspaceoditty 19 дней назад

did you know, they wanted to allow rotary engines to all forms of IFA racing. nascar, rally, f1, indy, woulda been sick, but the set up planning and all that was ruined by the big cough of 2020

@ohmygosh6176 28 дней назад

I have never seen a company trying this hard to convince us that engine design is good. Even if it means burning oil like gas. Simply amazing

@maplemayhem1988 28 дней назад

Just a more interesting 2 stroke

@ServeraServera0 28 дней назад

@@maplemayhem1988 And a less maintenance intensive one Edit: I simply assumed that because there are no modern 2 stroke cars and that already maintaining a really high performing 2 stroke bike is a pain in the ass (86-102cc) Forgot about emissions

@Alex-ve1og 27 дней назад

It's not just the company, there are rotary fanboys who will tell you that the unreliability is exaggerated and all you need to do is: Put synthetic oil in the gas tank at every fill-up, bring it up to 9000rpm every time you drive it, never shut it off when the engine's cold, and 50 other things that shouldn't be necessary for a daily vehicle

@Jlewismedia 27 дней назад

I don't think they are. If its using the 13b esque design there will be new affordable replacement parts available for older rotaries for some time to come.

@cardboardboxification 27 дней назад

nothing wrong with burning oil

@danielescobar7618 28 дней назад

They don't like being driven reasonably. Kept under load they last longer, mile for mile, than being grannied around in regular traffic

@johnburns4017 27 дней назад

Rotary engines do not like being revved up and down. They like a constant speed as in the hybrid - the MX-30.

@aavalos7760 26 дней назад

So its dead

@johnburns4017 26 дней назад

@@aavalos7760 Very much alive. You can buy an MX-30 hybrid. UAVs use rotaries.

@aavalos7760 26 дней назад

@@johnburns4017 We're talking cars. After that, we're talking about a single hybrid that features a rotary that doesn't even power the car, but to extend the batteries range...

@johnburns4017 26 дней назад

@@aavalos7760 We are talking about rotaries. The rest you seem to get.

@Grizly_Atoms 17 дней назад

as a mazda parts guy for several years, we figured out. running a mixed gas was the cure. yeah she smoked a bit. but they didn't break down and need the rebuild that all the others did at 100,000km

@Wolfpac 10 дней назад

what oil to fuel mixture did you use? And that was additional to the main oil-pump or a replacement to it?

@OggaDugga 9 дней назад

@@Wolfpacsounds like he mixed oil with his gas directly as if it were a 2 stroke.

@Wolfpac 9 дней назад

@@OggaDugga yes that's obvious

@SahnigReingeloetet 8 дней назад

Let me introduce you to emission standards

@trinityhoult6395 7 дней назад

@@OggaDuggathat’s literally what you’re supposed to do though, they’re pretty much equivalent to 2 stroke engines

@jackelewish1568 19 дней назад

Id love to have one of the few bikes designed to use the rotary engine. I bet they not only handle very uniquely but have an unusual way that it lays the power down. Plus they run so smooth which is always appreciated in motorcycles. No vibrating mirrors making it hard to see, and no tingling hands after a long ride.

@Gottiline_Ace 18 дней назад

Just don't get a Harley and you won't really gave that issue. 😂 I had a Honda Shadow and it was very smooth and had hardly any vibration at all. The exhaust makes a huge difference as well

@middleagebrotips3454 17 дней назад

Yes they are used in motorcycle for their superior weight to power ratio

@xavieralonso1886 16 дней назад

Casi todas las Honda van finísimas.

@flukedogwalker3016 16 дней назад

You talking about the Norton Rotary, the Suzuki RE-5, the Hercules or that Van Veen OCR-1000?

@jackelewish1568 16 дней назад

@@Gottiline_Ace I had a Honda nighthawk (which I think has the same engine thats in the shadow) and it wasn't no where near as bad as my uncles custom Harley but it is still enough to make your hands tingle if you ride on the highway around 70mph for a long time. Bikes with rotary engine have essentially zero vibration. I mean undetectable. Ive heard its common for riders to forget its running while sitting on it with their helmet on.

@noname-sd5dt 28 дней назад

The rotary is like fireworks. Bad for the environment Loud Annoying to others Short lived Expensive But fireworks, although pointless are fun and always bring on a smile.

@SK3L0lol 28 дней назад

Well put

@whitesingularity403 28 дней назад

I have never seen such a perfect analogy

@MG_LIFE_LBS 26 дней назад

Never heard such a great example of something before!

@_1onlychxrry 26 дней назад

Nor loud or expensive

@whitesingularity403 25 дней назад

@@_1onlychxrry yes they are

@cliffyknight 24 дня назад

I had an 80 something RX7. I loved it on the freeway. It felt like you could never redline. Fun stuff.

@jgambe78 16 дней назад

80 something?! How don't you know what year it was , I mean not even with a year?

@briankale5977 16 дней назад

Yea my Hemi doesn't redline either, it shifts gears. Cop catching you > redlining an engine at that rate in terms of chances anyway.

@ghost-4230 15 дней назад

@@briankale5977does its rods knock yet?

@jackelewish1568 14 дней назад

My granny always had RX7s her brother would sell her his older models. So in the 90s when I was growing up my granny had the coolest cars and they was stick shift. I remember my dad (her son) being like "hey we need to go to the store, can we take your car?" And me and him get in that thing and fly. Lol. My dad would scare the hell out of me and be like "don't tell granny" as we pull into her house. I'm in my 30s now and my dad passed but I genuinely want to find one around that model year just tye nostalgia of the dashboard and stuff. I remember how everything looked and smelled and stuff.

@wannabecarguy 14 дней назад

Somewhere in the comment section is a guy who will swear his wankle went a million miles without a hiccup.i wish I was capable of owning one.

@despairknot 18 дней назад

I used to work on those. Sealing them could be a nightmare.

@neko7981 18 дней назад

tried selling it to a collector- wanted it for dirt cheap or he'd report me. sold it. still got reported. now ppl call me billy. i miss my old name and real family

@daviddarby6263 19 дней назад

I had a 1972 Mazda RX-3. Drove it for about 3 years. Never had an issue.

@xavieralonso1886 16 дней назад

Incluso un coche con motor Puretech a los 3 años no te da ni un problema. A los 5 ya es otra cosa XD

@mean.7730 16 дней назад

why only 3 years ? 😶

@xavieralonso1886 16 дней назад

@@mean.7730 Los motores Puretech que van con correa de distribución llevan la correa bañada en aceite y se rompe. Es un fallo endémico, además la viruta de ésta correa mientras se va destruyendo poco a poco colapsa el filtro del aceite del motor. Es un motor fino pero no está muy bien hecho a medio y largo plazo. Los nuevos Puretech del 2023-24 algo han arreglado de todo ésto

@daviddarby6263 16 дней назад

@mean.7730 I was rear-ended by a senior citizen about a week before I left for US Army basic training. My Mother took the first offer the insurance company gave her.

@user-yb7br7ko8u 16 дней назад

Wank wank wankwankwank

@ImTHATguy... 29 дней назад

I've owned 12 RX-7s, my brother and friends have owned every rotary car/truck there is (yes, including a cosmo) and what really didn't help the rotary engine is NOBODY WANTS TO WORK ON THEM

@daviddale2570 28 дней назад

Nobody knows how to work on them/the emissions that nobody wants to work on

@ryanrehfuss 27 дней назад

Jesus, what circumstances led to you owning 12 RX-7s?

@putinslittlehacker4793 27 дней назад

How tf did you get your hands on a cosmo

@LynxStarAuto 27 дней назад

Don't know why, because they are super easy to work on.

@daviddale2570 27 дней назад

@@LynxStarAuto It's the emissions troubleshooting

@rileydream8942 28 дней назад

nobody followed the owner’s manual: after warmup, bring car to redline… fill oil regularly… (not in the manual: premix your gas)

@ryanrehfuss 27 дней назад

The real problem is Mazda's going to need stealth technology if they want to sell rotary drives in the States again

@Alex-ve1og 27 дней назад

@@ryanrehfussThere's a reason it has to come back in an SUV, they'd never hit the emissions and MPG requirements for a vehicle that's not legally classed as a light truck (an infamous loophole that has never been closed)

@DareToBeDeviant 27 дней назад

@@Alex-ve1og You have me curious now about what the 'best' mileage is for a contemporary fat assed SUV. The Monroney sticker can claim high numbers but have you seen the way people drive? Hours ago while at work, I heard and watched a Cadillac scream from a dead stop (red light) only to be going no faster than a 4 banger with compression issues. Not sure what model it was as they all look the same and are roughly the size of a city bus. 4 miles City / 12 miles highway?

@chaoszombie9995 25 дней назад

@@DareToBeDeviant tell me you over exaggerate.. without telling me you over exaggerate..

@nickolaspitts7804 24 дня назад

So no mention of the liquid piston engine???

@SirMCraftalot 16 дней назад

My first car was an 87 RX7, I also had an 86 many years later. Best two cars that I have ever owned. Never got that 93 twin turbo tho. 😢

@Farkasm 11 дней назад

Same. I had an 89 RX7 GTU and a 72 Charger Rallye. Best cars I've ever had. My rotary lasted for at least 180,000 before I had it rebuilt. Drove it every day for 12 years, and was the best cold weather and ice driving car. It never refused to start and I live in MN. I learned how to drive on the ice in the Charger. So the perfect balance in the RX made ice driving a cinch for me.

@charlesangell_bulmtl 22 дня назад

At one point I followed Norton rotary development. One bright spot in longevity was the precision gear tooth genarating at GETRAG whilst designing 6 7 & 8spd Auto gearboxes Tighter more precisegears would hopefully extend service intervals, theoretically the gaps could be closed nearly eliminating stress on the apex seals

@ironv8121 28 дней назад

Rotary engines are not meant to be daily driven, they work better as race engines.

@user-ix9qo7qd9o 28 дней назад

Why is that?

@lLOVECHILDREN 28 дней назад

@@user-ix9qo7qd9othey are designed for high rpms or something

@ironv8121 28 дней назад

@@user-ix9qo7qd9o Rotary engines need to warm up first and also burn up oil which is not ideal for a daily driver but they do make lots of horsepower in a smaller configuration than regular piston engines.

@leximatic 27 дней назад

...and they got banned from Le Mans.

@dualsportdiary1150 26 дней назад

Also banned from the Micky Thompson off road racing trucks series @leximatic

@u.e.u.e. Месяц назад

Same problems like 2-stroke engines. Advantage: high power at small volume of displacement; simplicity, low weight, low moving masses. Disadvantages: emissions of NOx and hydrocarbons, lubrication, durability.

@russotusso1695 Месяц назад

Rotories I would say are quite realible once you remember you can get 150hp per litre without a turbo, make a piston engine make that power and it won't be much more reliable if any. Also it won 24h of Le'Mans through not breaking down.

@u.e.u.e. Месяц назад

@@russotusso1695 Less durable than a well designed 4-stroke engine. No Wankel engine will last 400,000 km or more.

@pedinhuh16 Месяц назад

@@u.e.u.e.You would be lucky to see a wankel getting anywhere close to 200,000 kms driven.

@u.e.u.e. Месяц назад

@@pedinhuh16 Exactly!

@davzer3773 29 дней назад

@@pedinhuh16mine died at 32k miles🙈

@johnslugger 15 дней назад

*BMW did work in the 1990's on a ROTARY DIESEL and had great luck making 6 HP per lb. but they did not want to hassle with the EPA so they gave it up.*

@blackburngaming8345 19 дней назад

The entire design principle of the engine's function is what killed it. Hard to work on, doesn't last long, incredibly high rpm but only for some downright _abysmal_ torque curves, and the entire concept of the engine is just impractical. It doesn't have any major advantages over the standard piston internal combustion engine, and any mild advantages is does have are overshadowed by it's glaring flaws. Like I hear a lot of people say down in the south, "if it ain't broke, don't fix it"

@HoboThatIsHigh 28 дней назад

Rotary engines are just such a cool idea and design. I just love them.

@natehill8069 24 дня назад

They rev so smoothly, just pushing you to redline at every shift.

@headkicked 18 дней назад

You should check put the Liquid Piston Engine. It's like an inverted rotary engine.

@kingofthepod5169 28 дней назад

When your apex seals go compression is gone. When your piston rings go you still have some compression.

@gbeving3167 28 дней назад

Yep, all 5psi

@Juho-uf8si 26 дней назад

@@gbeving3167 ''some'' lmao

@daszieher 25 дней назад

In contrast, the rotary could be conceptualised without any seals at all. It would, of course, need a different design rotor and - most importantly - not be able to start with a normal starter and not be capable of low idle.

@CheeseInquisitive 23 дня назад

How would that be possible? Please explain

@codbumchris 19 дней назад

Tow that old 12a 1st gen rx7 for a few miles in 1st gear if you can't get it started.get those dried up apex seals soaked with oil and sealing again. You need a strong cranking setup to start a rotary with weak seals.

@ryannewman9028 20 дней назад

I like the reference to the rotor with the Dorito 😂

@vanbilly8387 17 дней назад

I had a '74 Mazda RX4 station wagon with a rotary, a 4spd manual, 4bbl carb and 13" wheels. That thing was tons of fun. It would chirp all the way into 3rd gear.

@chargerification 28 дней назад

Just their seals

@stephenviggiano1610 28 дней назад

I came to comments after the first three seconds to type “just apex seals”. Then I saw your comment and didn’t have to 🫡

@ryanrehfuss 27 дней назад

Inefficient compression ratio

@daszieher 25 дней назад

@@ryanrehfusscan be fixed with forced induction.

@jonathans2281 29 дней назад

Yet it once won the 24 hours of Lemans....

@tokirak 29 дней назад

because the car as a whole was more reliable, not just the engine being better lol

@jonathans2281 29 дней назад

@@tokirak their intent of doing the 24 was specifically to show the reliability of the rotary. The fact they set a record for number of laps helped the cause. But yes, the rest of the car proved reliable, butvtye fact that the power train required no work in the race was a big part of the success.

@emceeboogieboots1608 29 дней назад

And the FD won the Bathurst 12 hour endurance race in 1992, 93, 94 and 95 (though 95 was at Eastern Creek) Different engine, different car, still reliable

@MiguelGarcia-vj7oo 27 дней назад

@@jonathans2281 actually you Dorito fanboys need to do some real enthusiast research. The 787b was actually not that reliable. It won 1 race in 21 races it competed in it's two years of competition. A good handful of lost races were from DNFs. The engine was reliable but the rest of the car was terrible. It was not dominative, no one was scared of it, and the only race it won it just got lucky......

@jonathans2281 27 дней назад

@@MiguelGarcia-vj7oo Does growing up in a family that owned an rx2, rx3, rx7, and rx8 count for "enthusiast research"? Or would you rather I just Google stuff?

@HondaWyo 19 дней назад

Miss my rotary. Hope to get another one day

@Racstacko 21 день назад

I worked at a Mazda dealership as a salesman for a short while and I thought about getting a rx 8 cause I saw one cheap and the mechanic I asked about it said something along the lines of “you have to be a mechanic or really handy with all the maintenance they need,it’s not worth it”

@mjrdanishdestroyer01 29 дней назад

So basically it killed itself?

@randomdudeontheinternet9926 28 дней назад

It epsteindn’t itself

@Clyde-2055 27 дней назад

@@randomdudeontheinternet9926 - So that means the government did it …

@franz9002 12 дней назад

just like 2 strokes yeah

@DaBlaccGhost 28 дней назад

The rotary engine is it's own worst enemy. But they sound soooooooo goooooood

@baunax 20 дней назад

When I was very young I tried to come up with a stroke-engine, it was only in the early planning stage.. It was a 360° cylinder with powervalves.

@AdamXG92 11 дней назад

Die Back to the Roots Serie gefällt mir bisher richtig gut Danke dass du deine Erfahrung mit anderen teilst :)

@crabman823store9 29 дней назад

Yes the new rotary is in a boring car but that’s the point trying to prove how reliable they can make it then we hope they go to fun stuff 😢

@LRM12o8 23 дня назад

No, it's in a boring car because it can only pass the emissions regulations in a "light truck"

@squint09 22 дня назад

It only powers a generator. It's in an ev

@p.informatico1320 22 дня назад

@@LRM12o8 21 g/km (the emissions of the MX-30 R-EV), is actually a pretty good score even for a small car like the Toyota Aygo (108 g/km)... Problem is power output vs displacement, which isn't great...

@NGMonocrom 23 дня назад

I'd say its horrendous lack of reliability when the weather gets cold.

@micpango 18 дней назад

really?

@NGMonocrom 18 дней назад

@@micpango Yes. Very common and well-known issue with rotary engines.

@verttisyrjala2897 18 дней назад

@@NGMonocromWhy would temperature affect the reliability? The engine will just increase the amount of fuel injected. Unless you're talking about cold seizes.

@NGMonocrom 18 дней назад

@@verttisyrjala2897 I'm not an engineer. But again, unreliable cold weather starts is a HUGE and common issue with rotary engine vehicles. It's like the average person knowing that the Sun always rises in the East. But if you ask him why that occurs?.... No clue!

@dreamdesk7258 18 дней назад

@@NGMonocromI’d be very concerned if someone didn’t understand why the sun rises in the east 😭

@BrandonBumgardner-dm7ek 22 дня назад

That Mazda 737b kicked ass at Lemans when it came out in the 90s.

@Caliblazeup 3 дня назад

Mx-30😱. Looks really nice, I need to go get one!

@NicoTheAnimal 29 дней назад

Boost goes in seals go out😮

@shadowwolf225 26 дней назад

A single knock and the seals are gone.

@TheyCallMeMrMaybe Месяц назад

Apex Seals & emissions, mainly. A *healthy* RX8 gets 16mpg city & 22mpg highway. Thats Mustang GT fuel economy numbers from the same years. And that number gets a lot worse if those apex seals aren't doing their jobs. Also, rotaries burn oil. And to properly maintain your apex seals, you need to spend extra money on premix for your fuel so your rotary can also have MORE oil to burn.

@unleavenedkaraiteplus3412 24 дня назад

The more gas an engine can burns efficiently, the more power is making. That's why a Rotary makes at lest 2.2 more power than any piston engine wirh same displacement.

@luislongoria6621 24 дня назад

Turbos need oil too. If the engine drinks all the oil, things are going to get hot and dry, further complicating the rebuild. You're going to need at least 10 quarts oil capacity similar to endurance racing

@pizzlerot2730 21 день назад

@@unleavenedkaraiteplus3412If only that were the only thing that mattered. Cope elsewhere

@dailyrider2975 15 дней назад

1. New cylinder design by Mazda at the end, never used improved some of the combustion issues. 2 OIL, they didn't trust end user to refill 2 stroke oil container, so they used regular oil which leaves TERRIBLE amount of residue. DIY airplane builders have been using Mazda rotary for their planes with 2 stroke oil and seals and engine last a heck of a lot longer.

@JohnEvans-ct6mz 29 дней назад

I really enjoy that you bring an element of humor to engineering. A sense of humor is something that seems to elude a great many people of science, thank you for showing there are exceptions.😂

@ryanrehfuss 28 дней назад

My apex seal pet theory is that the tolerances are poorer, the motion more complex and less repeatable than piston rings. You also have multiple seals using the same cylinder wall. End result is the seals can't wear-in, severely limiting the life and sealing performance.

@CheeseInquisitive 23 дня назад

Seals don’t really cause problems it’s the housings they mate with

@HuntingTarg 21 день назад

@@CheeseInquisitivereally it's the problem that the seals traverse the entire circumference of the chamber which is being washed and then heated by the air-fuel-oil mixture. So no matter how good the materials and how refined the tolerances are, seal wear happens faster in a rotary than in a reciprocating combustion design.

@AnthonyGTrees 4 дня назад

Awesome information

@user-lr4rw2vd6f 16 дней назад

Thank u for the info...verry helpfull🤜🤛💪🤗

@iAmCymba Месяц назад

The rotary killed itself 😂

@chaoszombie9995 29 дней назад

Ironically the MX30 is no longer in production.. sooooo uhhh.. yeah.. safe to say there probably won’t EVER be a real return of the rotary (which I am even sad to hear.. and I hate the rotary engine)

@dianapennepacker6854 28 дней назад

God damn it. I want to take out that news on you. Where is the closest toddler so I can kick it? Hey if any millionaires read this. Please make a turbine series hybrid with at least three axial flux motors. (Helix UK motors has a motor they say produces 800BHP at 52 pounds! Need at least three. Then using the turbine to replace the heavy battery pack. That would make a sick hypercar.) I'm not an ICE guy, but this sucks. EVs are heavy. It was such a good idea replacing much of the pack with a small rotary. Better than hydrogen, that is for sure.

@mervynhoare2471 26 дней назад

may not be sold in the USA - but still available in Europe !

@asliceofloaf1984 25 дней назад

Hydrogen rotary may soon become a thing

@chaoszombie9995 25 дней назад

@@mervynhoare2471 are they still being made for Europe? I didn’t know that!

@chaoszombie9995 25 дней назад

@@asliceofloaf1984 I dunno man, I’ll be excited to see that come to fruition though!

@texaswunderkind 17 дней назад

My dad had a 1989 RX-7 convertible. The fit and finish on that car was amazing. It drove really nicely, and the automatic top sealed perfectly. In the frozen tundra of the north, however, it sat in the garage for four months while the snow melted, and blew blue smoke when he finally fired it up again.

@ImmortalLemon 10 дней назад

I just started working at Gleason last week and one of the first things I saw in the shop was an old rotary gear they had made back in the day on my bosses desk. I thought it was pretty cool, and now I know more

@FuncleChuck Месяц назад

What killed the Rotary Engine? Well usually it was the doofus driving it, But I suppose the answer is “physics, then economics”

@LRM12o8 23 дня назад

A.k.a the engine is too fragile for the average driver and even for the average sports car enthusiast!

@gentlesoul221 28 дней назад

Nice dorito reference

@JMPGTA 14 дней назад

“Oh Dear” killed me at the end 🤣🤣🤣🤣🤣🤣🤣🤣🤣🤣🤣🤣

@SimonsAstronomy 19 дней назад

Cool engine desing but when its not good, just go with the og one

@alfonsotatto8365 29 дней назад

It’s just impossible to make them meet the rules on emissions if they’re used as traditional engines. I’m honestly really surprised that Mazda managed to make the MX-30 plug in hybrid as they made it

@77thTrombone 25 дней назад

Constant load and low RPM fluctuations. Mazda should've introduced them for aircraft and small generator use where the loads are long term steady, not as the prime mover of a car. In a hybrid their load is more managed as the generator.

@sparkplug1018 28 дней назад

Oil consumption, crap fuel economy, horrible emissions, reliability issues, I mean take your pick what did it in

@gukabolo 28 дней назад

2 stroker now have friend

@sparkplug1018 28 дней назад

@@gukabolo If given a choice between a Mazda rotary or a Detroit 2 stroke, I would need to think about that. Probably take the Detroit diesel though.

@Derzull2468 26 дней назад

@@sparkplug1018 The RX7 and RX8 are amazing fun cars.

@sparkplug1018 26 дней назад

@@Derzull2468 True, and there are a lot of fun cars out there that just aren't reliable cars. So while I wouldn't pass on driving someones, there is no way I would park one in my driveway.

@gslom12 26 дней назад

It was the emissions Emission standards both drove the fuel economy down by removing the turbo, and raised concerns about oil consumption, which in turn lowered reliability as they tuned the OMP to inject as little oil as possible. It's all interconnected.

@user-fz2ul7wl2d 23 дня назад

I lost a very dear friend of mine yesterday as a matter of fact who had a 1980s RX7. 4 Barrel carb. Very light, very quick. What got me was the smoothness of the motor. Very advanced for its time. 5.0 mustangs hated those cars. It was very fun

@methree3821 19 дней назад

This is a cool video. You are the uncle/ brother / so we all need! ❤ from UKKK 🇬🇧

@YouThana 29 дней назад

Fritz Indra, famous German engineer, had better reasons why the rotary was doomed. The main reason is the terribly inefficient form of the combustion chamber. This is why they also have a terrible fuel efficiency.

@daviddale2570 28 дней назад

The shape of the rotor has a big effect on the combustion chamber and efficiency. Most design choices were limited by technology and materials.

@guzziwheeler 22 дня назад

Indra is a genious. And he is Austrian, not German.

@robertnorbert1068 21 день назад

First rotatory engine was designed by Pole…Gustaw Rózycki, 86 years ago

@YouThana 21 день назад

@@robertnorbert1068 do you have any sources for that? Because Wikipedia knows only a polish site. Apart from that it's weird that an engine is being named after another guy.

@conwaylai8562 28 дней назад

I understand that for constant torque applications, it's actually efficient (no numbers tho). How about using it to charge an EV, then driving an electric motor to the wheels?

@milosmarkovic2204 28 дней назад

Exactly what Mazda is using it for in their hybrids

@goatsplitter 28 дней назад

How about a traditional ice instead that's not as bad of a motor 🤷🏾‍♂️

@austyndrums1993 28 дней назад

I think it runs more efficiently when it's smaller. The new one isn't much bigger than an A/C compressor. And is specifically just for charging the battery.

@ryanrehfuss 28 дней назад

The whole "it works very efficiently at one speed" thing is true for a lot of exotic motors. Though I'm guessing the most optimal rotary still isn't a very efficient choice.

@remylebeau2357 26 дней назад

@@ryanrehfuss check out liquidpiston's completely new and genius rotary design.

@gatheringwolves8267 8 дней назад

I really feel from my own experience with rotary engines, I can imagine the manufacture costs was so high and the demand for replacement parts made it impossible to support that engine for so long, and the lack of customer care (one of the most high maintenance) engine platforms ever, not made for the typical driver who doesn’t maintain their car.

@tomhendricksen1805 16 дней назад

I once owned a Mazda RX4. The rotory engine was amazing. I think I like the linear power band the most. A friend reported criminal activity and a contract was put out on him. I was told about it (he did not know) and one late night a 69 Ford started messing with me. It was a hit man after my friend. The linear power band allowed me to stay ahead of the Ford when the power band began to level out. In the end the Ford driver made a mistake destroying the Ford and my frined, and me, have lived many years since.

@IAmAnonymyz 29 дней назад

If anyone is gonna perfect the Rotary....it's gonna be Mazda

@williamstamper442 28 дней назад

So basically you are saying this design will never be "perfected". Deeper meaning : can't polish a turd.

@marko7843 26 дней назад

Actually, a company called LiquidPiston has allegedly come up with an "inside out" rotary that solves all the Wankel problems...

@rocketsalad 26 дней назад

@@marko7843 their design is functionally identical to the original “Drehkolbenmotor” Wankel engine, it’s as old tech as rotary tech can possibly be and the company is, from everything I’ve read, a Ponzi scheme running on nothing but paid hype.

@remylebeau2357 26 дней назад

@marko7843 true, I've seen their solution, but I'm still a bit skeptical that they have actually fixed the original issues. Still a genius design though.

@JockBlock-vd2ep 24 дня назад

How do you perfect a bad design? A bad design is always going to be a bad design.

@TonyWestDIY Месяц назад

Lol, the end, though.

@Skippyrooadventures 12 дней назад

Went to a rotary revival event near me in Aus and the sounds 😮‍💨 and we do rotary drag cars which is wild concept

@pnojazz 17 дней назад

RX7, I owned a ‘79 and ’82 show car with an IMSA kit with flared fenders and a whale tail. Those were the days 😂

@pirobot668beta 29 дней назад

They are great engines...in torpedoes! Things like leaky seals and poor efficiency don't mean a lot if the thing runs for only a minute or two. The engines were run hot and hard...no sense in holding back, considering the thing is going to blow up! Wankels are amazing, they just don't run for long.

@sskuk1095 22 дня назад

Can I get an example of a mass produced torpedo type that uses a wankel?

@cideltacommand7169 20 дней назад

They run for like 20-40 minutes at max range Torpedoes need a delicate balance between speed, but as long as it can go 40 knots they want to maximize the range, preferably around 40 km

@Farkasm 11 дней назад

12 years and 180,000 isn't a long enough time?

@jodep2403 29 дней назад

Need to pour in lawn equipment oil. Oil mix fixes that.

@hyacinthbucket3803 28 дней назад

Into the fuel, like 2 stroke fuel mix?

@Oborowatabinostk 28 дней назад

@@hyacinthbucket3803yes

@ryanrehfuss 27 дней назад

The EPA would like to know your location

@jurgenmeriste6794 22 дня назад

@@hyacinthbucket3803 4 stroke oil straight to tank and then fuel it, mixes itself

@bernarrcoletta7419 8 дней назад

Back in the 70’s, my uncle had an RX-3. It was really cool.

@glasslinger 5 дней назад

I always had rotor housing O ring seals fail in the combustion area.

@CupOfJav 28 дней назад

Rob's quad-Dorito and the 787b are super cool but the rotary is a novelty. It makes for fun toys, and I'm glad they exist, but that's about it.

@yamil8003 29 дней назад

And the only reason people know about all of this is because unlike the RX-7 which was a lot rarer here in the US, the RX-8 was far more common with the same engine. So everyone now knew how bad they were and thus RX-7 fan boys will forever hate the 8 for blowing the whistle. Hence why the RX-7 doesn't have the reputation of the 8.

@wydra_gaming 29 дней назад

No, it has the same reputation, the car just looks better than an , Rx8. Have you ever heard the hate for ls swapped rx7s?

@wrth 29 дней назад

what does that change? everyone knows the rotary was reliably challenged for years before the RX8. If anything, the RX8 was non-turbo so it had a better reputation when it comes to reliability.

@yamil8003 29 дней назад

@@wrth Italian supercars back then had issues with reliability as well. The 7 was treated like one in the sense that people were willing to ignore the flaws for the appeal of an exotic sports car.

@yamil8003 29 дней назад

@@wydra_gaming I am well aware that all RX-7 fanboys consider it sacrilege to put anything other than a rotary in it. It's why they desperately want Mazda to fix the rotary engine. Many enthusiasts would love to see a more reliable rotary so they can slap it onto the 7s and go wild with them. It's one reason why they want it back. Also, "looks better" is subjective. The 7 is good but dated in my opinion.

@wydra_gaming 29 дней назад

@@yamil8003 The 7 isn't outdated. 90s jdms have timeless designs. Also you got like diffrent 7s: Rx-7 fc wchich has a boxy 80s design Rx-7 fd wchich has smooth edges and also pop ups like the fc Rx-7 that got modded-have removed pop ups, like Hans rx7 veilside. I dont hate the rx8 it looks good and is very good descendant to its ancestor but its completely diffrent it has that rx7 breath over it but its a visual downgrade because the RX7 in general has the same cult as Subaru. The engines are very unreliable. But the cars become so iconic that you cant say a bad word without the fanatics crying about them in the corner.

@therustbucket8095 20 дней назад

They struggle to last not struggle to compete

@guywithabrokenwheel1159 21 день назад

As someone who owns two rx7s I am thrilled they’re bringing it back at all, and their new sports car is said to have a hybrid rotary aswell!

@fleurdewin7958 17 дней назад

They only bring it back as a range extender for EV. So it is not the high revving rotary engine that we knew about.

@MammothBehemoth Месяц назад

As a guy who also has poor diet and likes spicy food, I can confirm us having terrible emmisions It's not zoom-zoom. It's boom-boom 🎉

@DarinRyder 28 дней назад

Emissions. Fuel and oil consumption and apex seals...

@madeintexas3d442 2 дня назад

Saying the mx30 has a rotary engine is technically correct but it does not directly power the drivetrain as It has a electric drivetrain. The rotary engine is used as a range extender and powers a generator to recharge the batteries of the vehicle.

@miguelfigueroa3963 6 дней назад

That spinning dorito killed me i dont even know why.😂

@LordCakeskull 29 дней назад

A large part of their incomplete burn is the unregulated leakage of compression between chambers via the leading spark plug aperture. Fix that, you get a cooler and cleaner exhaust, and a much better engine overall. It's been done before.

@MauricioRPP1 27 дней назад

Direct injection with a very flat surface then?

@LordCakeskull 27 дней назад

@@MauricioRPP1 Direct injection would be great too, but using a surface spark system with an aperture smaller than the apex seal solves the leak.

@stevemason4753 29 дней назад

It makes sense in a hybrid, small form factor, light, and can run at constant revs (the most efficient rev for the engine) at all times to charge the battery when needed.

@wumpusthehunted2628 29 дней назад

True, but an Otto will still do it better (at least in cars).

@Corgi_fax 25 дней назад

rotary lawn mower lmao

@JohnWilliams-gy5yc 24 дня назад

If you look at the output power of these MX-30 rims, the EREV Wankel MX-30 PHEV got the most hps. They want people to buy the Wankel this bad.

@Navyuncle 2 дня назад

I used to have one. 8 miles to the quart ( of oil). 😵‍💫

@patodwyer721 15 дней назад

Nice one

@literal_f22 29 дней назад

Rotary engines may get higher RPMs, but they get less power per rotation. The expanding gas does less.

@CliffNark 29 дней назад

But wouldn't a rotary produce more power than a four-stroke per rotation despite being less efficient since it completes three combustion cycles per rotation compared to the four-stroke's one combustion cycle every two rotations? I mean just take a look at the 2.6L 4R Mazda 787B which produces 700hp at 9k rpm where a late F1 V8 has to rev over atleast 15k rpm to produce similar power figures Edit: I was off in saying a rotary fires three times per rotation when in actuality it's once per rotation of the crank since the crank and rotor spin at different speeds

@martyscholes119 26 дней назад

You are close. The crank spins at three times the speed of the Dorito, so a complete combustion cycle happens at every turn of the crank. That’s also why they have high RPM numbers: when the crank is spinning at 12,000 RPM, the Dorito is only spinning at 4,000 RPM. They have horrible thermal efficiency (bad MPG) but absurdly high specific output (power per displacement). I recall that every racing body has either outright banned or handicapped the rotary engine because of its high specific output.

@BM-13_KATYUSHA 29 дней назад

If cars like the 787 were given more time, rotary engine technology would be more developed and maybe we wouldn't be suffering through an SUV epidemic right now.

@rhyswilliams4893 28 дней назад

We would still have SUVs everywhere...

@BM-13_KATYUSHA 28 дней назад

@@rhyswilliams4893 maybe we wouldn't because more efficient engines would be developed and cafe standards would be unnecessary.

@rhyswilliams4893 28 дней назад

@BM-13_KATYUSHA the more efficent engines were developed. If motor sport doesn't want them... they are generally not the optimal solution. Even more so when it comes to road transferability

@craigquann 20 дней назад

From what I understand, a lot of owners convert the oil injector pump to a stand alone tank and use 2 stroke oil. It burns cleaner due to the lower ash content. Many also premix their gas at 100:1 so it's not just the pump supplying the oil for the apex seals. Not sure how much of a difference it actually makes, but sounds good.

@itlnstalyn6224 14 дней назад

My 1990 1.3lt rx7 would smoke 5.0lt mustangs back in the day. I had the nonturbo version with just exhaust, intake and ignition upgrades. The rotary engines can produce a lot of power.

@bartekklusek9989 29 дней назад

That must have been quickest RU-vid advertising 😂

@adamcharest7228 29 дней назад

Hp ,rpm and apex seals

@username8644 29 дней назад

Fuel economy, oil consumption, poor reliability

@myvoiceyourstory9338 8 дней назад

Go to Hamilton NZ and you’ll see soooo many on the streets I was blown away

@omarjassar4650 17 дней назад

I like the guy with the chip on his shoulder 😂😂😂

@nathan584 29 дней назад

And it just a single rotor generator running at a set rpm having zero connection to the wheels

@braydenstafford2552 28 дней назад

Yay a soccer mom car with a engine that drinks oil and they wait until 50,000 to change the oil I see nothing g going wrong

@DeathGodKT 28 дней назад

The mx30 uses the rotary as a range extender not as a entire engine

@ryanrehfuss 28 дней назад

Lol, if someone brought a 50,000 mile rotary for first service I'd look at them like Jesus Christ walking on water

@joelcarson4602 2 дня назад

Emissions, apex and side rotor seals, realistic engine life of 100, 000 miles or less, generally bad thermal efficiency. On the plus side, would rev like there was no tomorrow and the volumetric efficiency was off the charts. Absurdly small displacement for great HP and torque without supercharging.

@onazram1 5 дней назад

My wife had a white RX7 when I met her, the car handled really well and had a flat torque curve right up to red line.. it was a blast to drive until it was stolen...

@thegamingslicer7375 29 дней назад

Answer: Apex Seals

@buffdelcampo 28 дней назад

I rarely had problems with apex seals. Many times I reused them. However the side seals on daily drivers would become seized in the rotor. I'm sure they weren't sealing. They were difficult to extract and would always need replacement.

@wcsoblake85 29 дней назад

Can we all just appreciate that sweet sound the rotary makes with the right setup? Mazda had, I think it was 787b, race car that was awesome.

@invincible4010 20 дней назад

Etna video dekha ring fitting ka link aaj smjh aaya kaise ring fitting hota hai

@ThreeTreeDog 8 дней назад

I love the sound and feel of a rotary, it can be improved, if you make surfaces of the irons and rotor housings more durable. I'm pretty sure I could increase the lifespan of a housing by 300-500% with no or very little oil, and one day when I get money, actual money, and not just trying to survive, I'll show you guys how it's done. Efficiency eh not so much of a improvement, the variable rpm range makes it hard to maintain efficient combustion. It's actually a efficient engine under certain conditions. That's why the hybrid route is actually quite smart, they can tune it to a certain rpm, because a generator produces stable output at stable rpms.

@seed_drill7135 29 дней назад

The Pacer and Monza were supposed to get rotaries, but GM canceled the engine because it was too dirty and inefficient.

@dlewis9760 27 дней назад

So they stuck a V8 in the Monza and I believe the official way to change spark plugs was to loosen the engine mounts and jack the engine up a bit. The unofficial way was to use a hole saw and cut holes in the fender wells. When not needed cover the holes with cut up inner tubes and rubber cement.

@seed_drill7135 27 дней назад

@@dlewis9760 I've heard that, but wouldn't know, I had an "odd fire" V6 Sunbird.